Calculate Pipe Flow Pressure Drop Easily with Hydraulic Pressure Drop Calculator

Our Pipe Flow Pressure Drop Calculator allows engineers, students, and industry professionals to accurately calculate pipe flow pressure drop for liquids in both laminar and turbulent flow regimes. The tool incorporates the Darcy-Weisbach equation and considers pipe roughness, diameter, length, and fluid properties. You can choose from a database of common liquids or enter custom fluid properties.

Why Use This Calculator?

  • Saves time compared to manual calculations.
  • Supports SI and Imperial units, dynamically converting values.
  • Provides flow regime detection (laminar or turbulent) automatically.
  • Includes database of common liquids (water at different temperatures, oil, glycerin, etc.).
  • Allows input by velocity or volumetric flow rate.
  • Pipe roughness can be chosen from common pipe materials.
  • Editable fluid properties even when selected from the database.

Equations Used

1. Reynolds Number (Re):Re=ρVDμRe = \frac{\rho V D}{\mu}

Where:

  • ρ\rho = fluid density
  • VV= velocity (or calculated from flow rate)
  • DD = pipe diameter
  • μ\mu= dynamic viscosity

2. Darcy-Weisbach Friction Factor (f):

  • Laminar Flow (Re < 2300):

f=64Ref = \frac{64}{Re}

  • Turbulent Flow (Re ≥ 2300):
    Haaland approximation:

f=[−1.8log⁡10(ϵ/D3.71.11+6.9Re)]−2f = \left[-1.8 \log_{10} \left( \frac{\epsilon / D}{3.7}^{1.11} + \frac{6.9}{Re} \right) \right]^{-2}

Where ϵ\epsilon = pipe roughness

3. Pressure Drop (ΔP) – Darcy-Weisbach:ΔP=fLDρV22\Delta P = f \frac{L}{D} \frac{\rho V^2}{2}

Where:

  • LL = pipe length
  • DD = pipe diameter

4. Velocity from Volumetric Flow Rate:V=QA=4QπD2V = \frac{Q}{A} = \frac{4 Q}{\pi D^2}

Where QQ = volumetric flow rate, AA = pipe cross-sectional area

How to Use the Pipe Flow Pressure Drop Calculator

  1. Select your unit system (SI or Imperial).
  2. Choose a fluid from the database or input custom properties.
  3. Enter pipe parameters: diameter, length, roughness, flow rate or velocity.
  4. Select pipe flow type (auto-detect laminar/turbulent or manually).
  5. Click Calculate to view:
    • Reynolds number
    • Friction factor
    • Pressure drop (ΔP)

FAQs

Q1: Can I use this calculator for gases?

  • This calculator is designed for liquid flows only. Gas properties vary significantly and require compressible flow analysis.

Q2: Can I edit the properties of fluids from the database?

  • Yes, once you select a fluid, all properties are editable.

Q3: Does the calculator automatically convert units?

  • Yes, all values are dynamically converted when switching between SI and Imperial units.

Q4: How is pipe roughness handled?

  • You can select common pipe materials (steel, PVC, copper, etc.), or manually enter roughness in mm.
Calculate Pipe Flow Pressure Drop Easily with Hydraulic Pressure Drop Calculator

Calculate pressure drop in pipes for laminar and turbulent flow using Darcy-Weisbach. Provided by CFD Vision.

kg/m³ Pa·s mm mm m
m/s
Results will appear here.

CFD Vision Disclaimer:
This Pipe Flow Pressure Drop Calculator is provided by CFD Vision as a professional tool for accurate thermal analysis. For expert CFD consulting services, detailed simulations, or support with complex thermal projects, contact us.

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